package StrategyPattern;import com.sun.org.apache.xpath.internal.SourceTree;/** * Created by Administrator on 2018-10-17. * 鸭子行为：什么都不做，不叫。 */public class MuteQuack implements QuackBehavior {    public void quack() {        System.out.println("什么都不做，不会叫！");    }}